1. but in case of any reason when I dislike the upgrade, where can I get back the firmware that worked before? Is there here an archiv with the list of all early firmwares? 2. I know what's the currently Android version. However I've no idea how to upgrade from the old version to the new one. I only know how to do on Linux ... Which version does X8H_PLUS_FW010.zip offer? Android 7.xx?